Stove and other heater



G. FURUHOLMEN.

STOVE AND OTHER HEATER.

APPLlcATluN man :upv 6, 1915'.

Patented Nov. 18, 1919.

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G. FURUHOLMEN. STOVE AND OTHER HEATER.

APPLICATION FILED JULY 6, I9I5.

Patented Nov. 18, 1919.

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G. FURUHOLMEN.

` sIovE AND OTHER HEATER.

APPLICATION FlLED JULY 6. I9\5.

Patented Nov. 18, 1919.

3 SHEETS-SHEET 3 STOVE AND OTHERl-IEATER.:

Specification of Letters Patent.

lPatented N ov. 18, 1919.

Applicationy filedJuly 6, 1915. Seri-a1 No. 38,114.

To all 207mm t may concern:

Be it known that I, GEORGE FURUHOLMEN, a subject ofthe King-.of Norway,residingat Minneapolis, in the county of Hennepin and State ofMinnesota, have invented new. and useful Improvements in Stoves andother Heaters, of which the following is a specification.

My invention relates to vimprovements in stoves or other heaters and itsobject is to provide a highlyeflicient heating device. n

More specifically is my object to provide a stove having an improvedfuel feeding device adapted under various conditions to automaticallysupply proper quantities of fuel to the fire box and to promoteeconomical combustion.

1t is also my object to provide in a stove of this kind a lire boxhaving an oscillating wall at the intake side thereof adapted toadvancey fuel step by step across the grate, so that said fuel maybesubjectedy to heat for a considerable period at the margin of the lireto distil gas and coke the fuel, preparatory to later consumption.

A further object is to provide in a stove of this class, a'baifle platewith an inletopening at its lower edge, said baflie plate being arrangedto direct the gases, from the coking fuel, mixed with air into theflames of the burning fuel.

A further object is to provide in astove having a fuel hopper and{ire-box, means for supplying the fire-box with fuel'y from the hopper,said means 'being arranged so that the stream of fuel is broken, c toprevent backiiring from said fire-box to said hopper.

A still further object isto provide in a stove of this kind, means .fordisintegrating the coke at the margin of the fire.

My invention also includes various novel features of construction, whichare hereinafter particularly described and pointed out in the claims.

Iny the drawings, Figure l is a longitudinal sectional view illustratingav stove equipped with devices embodying my invention; Fig, 2 is asectional view taken on thel line 2*2 of Fig. 1; Fig. 3 is an endelevation 0f aA stove and shows part of my improved feeding device andthe operating mechanism einployed; Fig. l is a perspective view indetail of the oscillating lire-box wall; Fig,V 5 isa perspective view indetail of` thc feeding bucket; Fig. 6 is a detail sectional view showingthe tiltable grate and adjustable ire wall adjacent thereto; Fig. 7 is aperspective view in detail of a portion of the tiltafble grate; and Fig.8 is a plan view of a portion of the stationary grate.

Referring-to the accompanying drawings, IV have illustrated an ordinarystove having sides 10, top 11, and flue 12, provided with mechanismembodying my invention., which comprises essentiallyT a fire boX Asupplied with an oscillating wall 13 adapted to advance fuel across thegrates, a fuel hopper B and a fuel feeding bucket C designed to receivefuel from said hopper and deliver the same into said fire box.

` he lire-box A consists of a. stationary gratell, a tiltable grate 15,an adjustable lire wall 16, the oscillating wall 13 and sides 17'. Thestationary grate 14 includes aseries of grate bars 11a removablysupported upon rods 14b mounted aty their ends on the sides 17;Thetiltab'le grate 15 extends transverse-ly across the fire-box andspans the space between thevstationary grate 14 and fire-wall 16. Saidtiltable grate consists of a plurality of parallel bars 15a with spacesbetween the forward portions thereofand said bars arey detachablysecured to an oscillatory shaft 18fwhich is journaled at its ends inthesides 17. The heavier portion Qf the barsela overhang the side of theshaft 18 adjacent to the stationary grate and saidshaft isturned by theweight of said bars to a position in which the arm 19 on thelshaft'engages the stop 20 at the side of the fire-box to retain Ythegrate in normal position. A curved depending projection 15b isformedffatthe forwardend of each bar to block the space between said bar and thestationary grate 141, when said tiltable grate is lifted. At the rear ofeach bar acrushing face 15e and ash retaining lug 15d are formed. Thelug 15C1 supports the refuse when the grate 15 is in normal position andthe crushing face 15c breaks up the material between the grate 15 andthe concave surface 16"el of the fire wall 1G as said grate is tiltedupward. The arrangement of the crushing surfaces 152 and 16L is `suchthat the lower part ofthe opening between them is enlarged as theforward'endof the grate 15 is raised to facilitate the eXit ofwastematerial through saidopening. The fire wall 16 hangs on a pivot andis secured in desired position with respectcto the grate 15, byadjusting the set screw 21, which is threaded in the lower margin ofsaid wall and abuts against the side 10 of the stove.

The oscillating feeding wall 13 consists of a plate 13a formed with ears13b at the ends thereof, said ears being pivotally attached to the sides17 of the fire-box by pintles *13c` secured in said ears. A lug 22projecting from the lower side of said plate is pivotally connected by alink 23 with an arm 24 on a rock shaft 25 revoluble, at its ends, in thesides of the stove. The shaft 25 is supplied with an arm 26, and a rod27, having a handle 2S thereon, is attached to said arm 2G to oscillatethe same and rock said shaft (see Figs. 2 and 3). Rotation of the shaft25 in one direction swings the wall 13 toward the opposite side of thefire-box A as indicated in dotted lines in Fig. 1, thus pushing the fuelacross the grate, and rotation of said shaft in the opposite directionreturns said wall to normal position as indicated in solid lines in Fig.1.

A depending baille plate 29 between the sides 17 of the lire-box extendstransversely across the middle of said fire-box and said baille plate issupplied with an air conduit 30 opening at its lower edge to mix fresh-air with the gases liberated from the coking fuel in the fire-box.

Sloping downward from the rear of the baille plate are a number of rigiddisintegrating lugs 31 adapted to break up coked portions of fuel as itis advanced toward the grates of the lire-box by the oscillating wall13.

The hopper B is assembled in the stove and has a horizontal opening atits lower edge beneath the lire-box A.

The bucket C for carrying fuel from the hopper to. the lire-box consistsof. curved ends 32, a bottom 33 and a curved side wall 34 which extendsa considerable distance beyond the bottom of the bucket. Said curvedwall is secured at its lower end to a pair of arms 35 which are fixed toand turned by the rock-shaft. The curvature of the wall 34 correspondswith an arc struck from the axis of the rock-shaft 25 and said wall iitsin sliding contact with the inner edge of the bottom 35 of the hopper B.When said bucket is depressed, the upper edge of the curved wall 34rests beneath the bottom 35 of the hopper and permits the loading ofsaid bucket with fuel from the hopper and when the bucket is raised saidwall blocks the mouth of the hopper. A stationary curved wall 36, fixedto the sides of the stove and conforming in curvature with an arc struckfrom the axis of the shaft 25, closes the inner side of the bucket C atall times except when said bucket reaches its elevated position as shownin dotted lines in F ig. 1. The upper edge of this stationary curvedwall 36 rets adjacent to the upper edge of the oscillating wall 13 ofthe iire box A when said wall 13 is swung forward as illustrated inFig. 1. To aid in iilling the bucket with fuel from the hopper, Iprovide a convey'er tray 37 slidable upon the bottom 35of the hopper.This tray is connected at opposite sides thereof with links 38 each ofwhich is attached at one end to a pin 39 passing through a slot 40 inone side of the hopper B, the other end of said link being pivotallysecured to one of the arms 35 on the rock-shaft 25. These links causethe tray 37 to reciprocate, thus delivering fuel from the mouth of thehopper. A guard plate 41 is arranged at the back of the hopper to directthe fuel toward the mouth of said hopper and to prevent the escape offuel through the slots therein. As the bucket C is elevated, theconveyer tray is shifted backward, preparatory to the delivery of a newcharge of fuel from the hopper, and the oscillating wall 13 is swungforward to advance the fuel across the grates 14 and 15 and make roomfor the fresh supply of fuel 1n the rising bucket. Upon reaching itselevated position, the contents of the bucket, or so much thereof as isnot held back by the fuel already on the grate, is discharged over theupper edge of the oscillating wall 13 andA falls into the fire-box. Whenthe fire-box is full, the fuel remaining in the bucket returns with thebucket on its downward stroke; the conveyer tray is shifted forward toreplenish the bucket with fuel from the hopper and the oscillating wall13 is swung' back to normal position at the end of the lire-box.

I provide meachanism whereby the grate 15 is tilted by the movement ofthe rockshaft 25. An arm 42, secured to one end of the shaft 18, (seeFig. 3) rests in the path of a dog 43 which is pivoted on the end of alever 44 on the rock-shaft 25 and is adapted to turn in one directiononly. Said dog strikes the end of the arm 42 as the rockshaft 25 isturned. When said shaft is moved to raise the bucket C, the dog 43 istilted by engagement with said arm 42, which it passes, but on thereturn stroke said dog carries the arm 42 with it and tilts the grate 15until said arm is released from the dog 43, when said grate falls bygravity to its original position.

lt will be noted that the baffle plate 29 divides the lire-box into acoking and a combustion chamber, the former being between said bailleplate and the oscillating wall 13 and the latter between said plate andadjustable wall 16. In the coking compartment gases are distilled fromthe fuel and said gases pass beneath the baille plate 29 where they aremixed with fresh air as they enter the combustion chamber. The grates inthe combustion chamber slope upward from beneath the baille plate andthis arrangement causes the surface of the bed of coals to slope upwardtoward the flue, thereby bringing the surface of the glowing coals linclose Contact with the gases as they pass upward toward the fine, toinsure the ignition of said gases.

In use, the rod 27 is pulled outward to turn the shaft 25 and carry thebucket C from the hopper B and empty its contents, or so much thereof ascan pass into the firebox. This manipulation of the rod 27 causes theoscillating wall 13 to swing forward and push the fuel in the fire box aslight distance across'the grates 1+i and l5 and also results inshifting the conveyer tray 37 toward the rear of the hopper B. Theswinging of the wall 13 to niove the fuel farther into the fire boxcauses the same to pass between the disintegrating lugs Si,

whereby caked portions of the fuel are broken up. Said rod is thenpushed back to return the bucket C and the oscillating wall 13 to theiroriginal positions and also to move the conveyer tray 37 forwardandrenew the supply of fuel in the bucket. This movement of the rod 27causes the further tilting of the grate l5 thereby discharging aquantity of ashes from the grates. Said rod 27 is reciprocatedintermittently as desired and may be operated by hand or by any7suitable source of power.

1What I claim as new and desire to protect by Letters Patent is:

l. In a stove, a frebox, a hopper having a mouth beneath the firebox, abucket, means for reciprocating said bucket between said mouth andirebox in an arc of substantially 45o, said bucket being open at its topfor the receipt of fuel and open at the side for the discharge of fuel,means for blocking the mouth of the hopper at all times except when thebucket is fully depressed, means for closing the opening at the side ofthe bucket at all times except when the bucket is fully elevated,whereby said bucket is adapted, when tilted to an angle of 45 at theupper end of its stroke, to dump such portion of its contents as willill the firebox and retain the balance during its return stroke.

2. In a stove, a re box having a movable wall arranged to push the fuelacross the bottom thereof, means for feeding fuel into said fire boxadjacent to said movable wall and rigid lugs, depending from the top. ofsaid fire box, between which said fuel is passed, said lugs beingadapted to disintegrate said passing fuel.

3. In a stove, a fire box having an oscillating wall adapt-ed to movefuel across the bottom thereof, a hopper, a traveling bucket arranged tomove back and forth between said hopper and fire box to carry fuel fromthe hopper and discharge it over said wall into the fire box and meansfor simultaneously moving the bucket and oscillating wall, whereby aquantity of-fuel is fed into the fire box, when said wall reaches theend of its stroke in advancing fuel across said fire box.

4. In a stove, a rebox, a hopper having a mouth beneath the irebox, abucket designed to travel up and down between said mouth and firebox andformed with an opening at its top for the receipt of fuel and an openingat one side thereof for the discharge of fuel, means for blocking themouth of the hopper at all times except when the bucket is fullydepressed, means for closing the opening at the side of the bucket atall times except when the bucket is fully elevated, means in the fireboxadapted to shove fuel across the bottom thereof, the movements of saidfuel advancing means and bucket being so coordinated that the fuel fromsaid bucket is emptied into the irebox as said fuel advancing means isactuated. Y

In a stove, a firebox, a fuel hopper having a discharge opening in oneside thereof, a revoluble shaft beneath said firebox, means actuated bysaid shaft to push fuel across the bottoni of said irebox, a stationarycurved wall and a vertically oscillatory curved wail. spaced from saidstationary wall, a bottom rigidly secured to said oscillatory wall andin slidable contact with said stationary wall, and arms connecting saidoscillatory wall to said shaft, said oscillatory wall and bottom beingadapted to receive and deliver fuel from said discharge opening to saidrebox simultane ously with the actuation of said fuel advancing means.

6. In a stove, a firebox, a hopper having a mouth beneath the firebox, abucket designed to travel up and down between said mouth and firebox andformed with an opening at its top for the receipt of fuel and an openingat one side thereof for the discharge of fuel, means for blocking themouth of the hopper at all times except when the bucket is fullydepressed, means for closing the opening at the side of the bucket atall times except when the bucket is fully elevated, an oscillatory wallin the irebox adapted to shove fuel across the bottom thereof, themovements of said wall and bucket being so cordinated that the fuel fromsaid bucket is emptied over the wall as said wall reaches the end of itsworking stroke.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE FURUIIOLMEN.

lVtnesses F. C. CAswnLL, .Toi-1N E. STRYKER, Jr.

